International Chronostratigraphic Timescale
The interval definitions in this timescale are derived from the following sources:
- K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
- W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
There are 59 timescales which overlap this one. show
Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 126148 collections
International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Cenozoic Subepochs | ||||||
---|---|---|---|---|---|---|---|---|
Quaternary | Holocene | Meghalayan | 0 | |||||
Northgrippian | 0.0042 | |||||||
Greenlandian | 0.0082 | |||||||
Pleistocene | Late Pleistocene | Late Pleistocene | 0.0117 | |||||
Chibanian | Middle Pleistocene | 0.129 | ||||||
Calabrian | Early Pleistocene | 0.774 | ||||||
Gelasian | 1.8 | |||||||
Neogene | Pliocene | Piacenzian | Tertiary † | Late Pliocene | 2.58 | |||
Zanclean | Early Pliocene | 3.6 | ||||||
Miocene | Messinian | Late Miocene | 5.333 | |||||
Tortonian | 7.246 | |||||||
Serravallian | Middle Miocene | 11.63 | ||||||
Langhian | 13.82 | |||||||
Burdigalian | Early Miocene | 15.98 | ||||||
Aquitanian | 20.44 | |||||||
Paleogene | Oligocene | Chattian | Late Oligocene | 23.03 | ||||
Rupelian | Early Oligocene | 27.82 | ||||||
Eocene | Priabonian | Late Eocene | 33.9 | |||||
Bartonian | Middle Eocene | 37.71 | ||||||
Lutetian | 41.2 | |||||||
Ypresian | Early Eocene | 47.8 | ||||||
Paleocene | Thanetian | Late Paleocene | 56 | |||||
Selandian | Middle Paleocene | 59.2 | ||||||
Danian | Early Paleocene | 61.6 | ||||||
66 |